 They're a health risk associated with the use of marijuana for use only by adults 21 and over. Keep out of reach of children. Marijuana should not be used by women who are pregnant or breastfeeding. Central Peninsula Kenai Spine proudly welcomes Dr. Samuel Adams, an esteemed orthopedic spine surgeon with an outstanding 10-year track record. In addition to cervical spine procedures, he works on thoracic and lumbar spine conditions and performs both fusion and motion-preserving procedures like disc replacement. Don't let that pain derail you. Dr. Adams is accepting new patients.